Furnace



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N- PETERS, PHOTO-LITHOGRAPHER, WASHSNGYON, D C.

lUNITED STATES PATENT OFFICE.

CHARLES F. CORY, OF LEBANON, ILLINOIS.

FURNACE.

Speeicaton of Letters Patent No. 30,724, dated November 27, 1860.

To all 'whom 'it may concern:

Be it known that I, CHARLES F. CORY, of Lebanon, in the county of St.Clair and State of Illinois, have invented and made certain new anduseful Improvements in Smoke-Consuming Furnaces; and I do hereby declarethat the following is a full, clear, and exact description of the saidimprovements, reference being had to the accompanying drawings, making apart of this speciication, in which- Figure l, is a front elevation ofthe furnace. Fig. 2 is a side elevation of the furnace, with a fragmenttaken out, exposing to view the interior arrangement of the grate andfire back and draft walls.

The nature of my improvements, consists in the construction of afurnace, having for the desired object, economy of fuel, more perfectcombustion, greater equality of heat, together with greatly diminishedlabor in the management, and economy of time, in the employment of myimprovements.

The better to enable others to construct and operate the same, I willherewith more fully describe the nature and principles thereof and asapplied to steamboats, and for other purposes.

In Figs. l and E2, the letters a., a, a, a, indicate the walls of afurnace; b, Z), the smoke pipe; c, c, c, a horizontal boiler; d, d, el,cl the grate bars of the furnace; c, c, the ash and cinder pit and coldair chamber or receptacle; f, f, f, the fire or fuel chamber, and at g,g, g are indicated the bars, and openings of the inclined, perforated,and Ventilating lire back.

At 7L is the cap or top of the hot air chamber I', and at J, J, J, isthe vertical solid back or hot air deflector.

At 7c, 7c, is indicated a valve damper the whole length, and width ofthe hot air chamber. This valve damper is attached on a longitudinalaxis or turn bar L and arranged horizontally when closed.

At m, is a solid structure or wall, on the top of which is attached onan axis, a cutoff n to close up when desired the passage or opening 0.

At I), P, is a diaphragm drop guard, or check wall, and at q is asemi-deecting wall, and at r is indicated the rarefaction chamber.

The arrows l, 2, indicate the direction of the cold current of airbeneath the grate and fuel. The arrow 3, 3 indicates the direction ofthe cold current of air entering up into the rarefying chamber I', andpassing out between the open grating g, g, upwardly in the direction ofthe arrows t, L -it, t, around over the cap or top L, thence deficcteddownwardly by the diaphragm, drop guard I), I), through the passage 0,thence upwardly, and thence out over the semidefiecting back Q, in thedirection-indicated by the arrows 5, 5 6, into the rarefaction chamber,or heating space r, as in Fig. 2, and acting directly on and around thebottom and sides of the boiler C, C, C, the eX- hausted heat passing offthrough the flues b.

In the operation of my improvements, the following results ensue, all ofwhich are deemed new and important in their character:

The first feature of improvement is the great economy of fuel, and thisis brought about in the following manner: By referring to the drawingsFigs. l and 2, it will be perceived that the grate bars d, d, el,depend, or hang down entirely below the line of the mouth or opening ofthe fire place, and are entirely exposed to the air, immediately infront, and also, beneath, as indicated at e, e, and f, f, f, Fig. l;while above are the openings with their respective doors s, s.

In tiring up the furnace, the grate df, df, tlf, (lf, elf, is partlyfilled with fuel., or for economy, clinkers, cinders, or any refuse, maybe deposited on the bottom of the grate, and then fresh fuel depositedthereon and ignited. The doors s, s, are closed, when the draft entersimmediately through the opening beneath at e, e,-f, f, f, f, Fig. l, andin the direction of the arrows l, l, l, Fig. 2, and thus the oxygen ofthe air being supplied to the mass of fuel, from beneath, andimmediately in front, instead of on the top or over the bed of fuel, thecombustion is more perfect; and inasmuch as the strata or mass ofcinders or clinkers beneath the fuel becomes thoroughly heated,affording a considerable amount of caloric, without loss of bulk, and asthere can be no deadened or partially consumed fuel therefore there canbe little if any waste, in consumption, of the ignited mass, andconsequently much less fuel is required at the time to aord the requiredvolume of heat. Again in order to extract all the carbonaceousproperties of the reduced quantity of fuel, and to produce a moreperfect combustion the hot air chamber I, there becoming rarefied, andheated, forces out forwardly through the inclined openings of theventilating fire back g, g, Fig. l, and intermingling with the caloricand its gases at the point indicated by the arrows 4, 4L, Fig. 2,supplies the required amount of oxygen; the air thus first becomingheated inthe chamber I, before coming in contact with the carbonaceousproperties of the fuel, consequently, the gases of the fuel being setfree, are takenu by the heated oxygen,

and are perfectly composed, before escaping through the passageindicated by the arrows 5, 5 6, 6. By this means of supplying the oxygento the mass of fuel, little if any smoke results, therefore a muchgreater volume of heat is afforded from a given amount of fuel; andbesides a much greater equality or uniformity of'heat can be broughtabout, and by carrying out fully the mode herein shown there cannot beany choking up, or coating of the flues and channels of the furnace withsoot, and residiuum, or floating ashes.

By the aid of the valve damper K, L, the quantity of oxygen can beincreased or diminished. And by aid of the diaphragm drop guard, orsuspension back P, P, the current or volume of hot air is'prevented fromforcing out too rapidly, and should any floating particles, or sparks,be thrown oif from the fuel, this suspension back acts as a fender, orcheck, and prevent-s their escape into the flues of the furnace. By

the aid of Vthe cut off n, Fig. 2, the back draft of the hot air can beincreased or diminished, more or less, or regulated as occasion mayrequire.

Y The design of the semi-delecting wall f, is to break the draft andrevent the too sudden chilling of the hot air in passing around theboiler C, C, C, and in mingling with the volume of air in the space r,as well as morel fully to prevent the passage out of any floatingparticles in form of sparks or cinders.

If desired, the portion marked m, instead of being solid, may beformedas an auxiliary air chamber, and likewise be made to answer as areceptacle for any floating particles, or may be made as a water tank,which Linder some circumstances may be A found very useful.

In the employment of my improved smoke consuming furnace, a greatlyincreased economy of space and compactness of construction are broughtabout, and in the management thereof, great saving of manual labor isaccomplished, together with greater security from accident, and savingofl time, as well as greatly reducing the endangerment of health to theperson engaged in the management thereof.

So far as my improvements have been tested they have diminished theattending expenses at least fifty per cent., and it has been found thatone person can do what heretofore has required the services of threeemployees.

Having described the nature, construction, and operation, and mode ofapplying my improvements in smoke consuming fur-- naces, and desiring tosecure the same by Letters Patent of the United States, what I claim is-The special construction and arrangement of a furnace, having one ormore open fronts e, 6,-f, f, Fig. l, and the cold-air chamber e2, 62,-Fig. 2, with the perforated or ventilatingY fire back g, g,-hot-airchamber I, and valve K, L-the diaphragm drop guard, or suspension backP, P,-the cut olf 71 and check wallg, as hereinbefore fully set forthand described. Y v

CHARLES F. CORY.

